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- THE FORGE |
Special steels are necessary to make knives. To ensure the best cutting edge, stell high in Carbon is chosen.
Band of steel are cut into billets, carefully calculated to conform to the final specification of the knives. These are then heaten to 1150° centigrade to enable forging to take place. The red hot billets are carefully placed under the drop hammer in a 3-part mould which exactly corresponds to the size of knife in production.
Three blows of the massive drop hammer are needed, one in each section of the mould, to forge the billet into the required shape. Showers of sparks accompany this operation.
After forging, the knife is returned to the furnace and heated to 800° C to make it malleable once more, in order to trim the rough shape to the exact form required.
The tang is then pierced to take the rivets which will be used to maintain the handle on it.
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- THE TEMPERING - STAINLESS STEEL |
Tempering gives hardness to the knife to ensure a long lasting cutting edge. It’s a very important operation. The knives are carefully placed in special trays. They are put into the furnace at 1040° centigrade.
After a period at these high temperatures, the knives will be placed in a machine to straighten them during the cooling time to prepare the Grinding Operation.
The knives are then put back into the furnace to "return" hardness to the steel (200°-300° C).
After the process the knives will have an hardness of 54 - 56 Rockwell, that is to say the resharpening will be easy with a steel.
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THE TEMPERING - CARBON STEEL |
Tempering gives hardness to the knife to ensure a long lasting cutting edge. It’s a very important operation.
The knives are carefully placed in special trays. They are put into the furnace at 820° centigrade.
After a period at these high temperatures, the knives are immediately placed into oil. The knives are then put back into the furnace to "return" hardness to the steel (200°-300° C).
For the Carbon Knives, we verify their straightless, one by one.
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- THE GRINDING |
Very important operation also, because it is to grind the blade of the rough knife and to give him the best possible cutting edge.
The blade passed on several times in a grinding machine to remove the maximum of metal by friction of the grinding stone on the blade knife and to arrive at the best smoothness of the edge. Another operation will consist in removing all the stripes caused by the grinding operation.
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- BULK POLISHING |
This operation consist in removing all the stripes caused by the grinding operation.
We also prepare the sharpening edge of the knives.
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- THE POLISHING |
It is necessary to grind all the rough parts of the knife to remove calamine and to make them brilliant. For our different ranges and models, several tools (different forms and different angles) are necessary to grind the various parts of the knife (bolster, tang, corbin, chin and back).
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- THE HANDLE MOUNTING |
This operation is to adjust the handle on the tang of the knife.
After having adjusted the two parts of the materials to form the handle, it will be necessary to bore these ones to allow the passage of the rivets. The handle is shaped to give him its form to be adapted of the tang of the knife.
A first polishing will prepare the handle to other final polishing operations.
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- THE FINAL POLISHING |
It is an operation which requires a very great professional qualification, because it consists in giving to the unfinished knives the best finishing.
For that, it is absolutely necessary to polish all the visible parts of the knife. With various tools of sizes and different forms, the work polish the bolster, the corbin, the chin, the back, as well as the four faces of the handle.
Then lt comes the operation of rayassage which consists in removing all the small stripes of the blade and to give him the final brilliance.
Finally the last operation of manufacture arrives : a grinding stone is used to refine to the maximum the edge of the blade and to give to the knife the best cut.
The knife is thus finished. It then will be wiped, marked on the blade, then packed.
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